Whirlpool Washer Service Manual page 12

FOR SERVICE TECHNICIAN'S USE ONLY
7. If the power cord passes the continuity
check, replace the main harness.
8. Visually check that ALL connectors
are fully inserted into their circuit boards.
9. Reassemble all parts and panels.
10. Plug in dryer or reconnect power.
11. Perform the "Quick Diagnostic Test"
through Service Diagnostics to verify repair.
TEST #3: Motor Circuit
3 Quick Check: Motor activation and related
attributes are provided in "Service Diagnostics
➔ Component Activation ➔ Motor".
This test will check the wiring to the motor
and the motor itself. The following items are
part of this motor system:
Part of Motor System
Drum belt
Door switch
Harness/connection
Thermal fuse
Drive motor
Belt switch
Centrifugal switch
Machine control electronics
NOTE: Refer to strip circuit on page 22
to diagnose drive motor.
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Check for loose, worn, or damaged drum
belt—repair as necessary.
4. Door Switch problems can be uncovered
by following procedure under TEST #7: Door
Switch, page 20; however, if this was not
done, the following can be performed without
applying power to the dryer. Connect an
ohmmeter across CCU P8-3 (neutral, white
wire) and P8-4 (door, tan wire).
 With the door properly closed, the ohmmeter
should indicate a closed circuit (0–2 Ω).
 If not, check harnesses and connections
between CCU and door switch. If good,
replace the door switch assembly.
5. Motor Circuit Check - Access the CCU and
measure the resistance across P8-4 and P9-1.
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 If resistance across P8-4 and P9-1 is in
 Otherwise, continue to step 6.
6. Check the wiring and components in the path
between these measurement points by referring
to the appropriate wiring diagram (gas or electric)
on pages 25 or 26. NOTE: To access motor
system components, refer to Dryer Disassembly
Instructions, page 23.
ELECTRIC DRYER ONLY: Check the thermal fuse.
See TEST #4b: Thermal Fuse, page 17.
ALL DRYERS: Continue with step 7 below to test
the remaining components in the motor circuit.
7. Check the drive motor and belt switch.
Slowly remove the drum belt from the spring-
loaded belt switch pulley, gently letting the belt
Electric Gas
Dryer Dryer
switch pulley down. See figure 16.
no
8. Remove the white connector from the drive
motor switch. See figure 17.
the range of 1 to 6 Ω, the motor circuit is
acceptable. Replace the CCU.
Belt Switch Pulley
Drum
Belt
Figure 16 - Slowly remove drum belt.
Drive Motor
Switch
White
Connector
Figure 17 - Remove white connector.
DO NOT REMOVE OR DESTROY